JP2000198570A - Roller for office equipment and manufacture of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin roller capable of realizing both of low hardness and high durability by forming a roller body out of a mixture composed by including fine bubbles mixed by a gas mixture method. SOLUTION: A liquid elastomer blended matter is composed of at least two components, that is, a liquid elastomer material and a surface active agent, and a hardening catalyst, an electronically conductive filler such as carbon black and the like providing the electric conductivity, an ion conductive agent, and/or a filler such as a colour pigment, an age resistor, clay, calcium carbonate and the like are mixed according to the necessity The inert gas such as dry air or dry gaseous nitrogen is blown into the blended matter with a predetermined volume ratio, and sufficiently mixed to prepare a gas-liquid mixture. A mixture application process for applying the gas-liquid mixture to a shaft by coating and the like is executed. As a material of the shaft, aluminum, stainless steel a metallic material obtained by applying nickel electroless plating to steel material, or a resin such as polypropylene and the like can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller for office equipment and a method of manufacturing the same, and more particularly, to a thin wall having a low hardness and a high durability, which is suitable for office equipment. And a method for manufacturing the same.

[0002]

2. Description of the Related Art OA office equipment such as copiers, printers, and facsimile machines are used to transport paper as a print medium, charge a photosensitive member, apply and transport toner, transfer the toner to a print medium, and perform other operations. To remove residual toner, etc.
A roller made of a polymer elastic material such as rubber is preferably used. This is the low hardness of the elastic body, the physical properties of high durability, the characteristics required for the roller, namely, a large depression by a small pressure (nib pressure),
This is because it satisfies the good permanent compression set characteristic that the elasticity is restored even after repeated use. Therefore, the elastic body having the above physical properties is formed and processed into a desired cylindrical shape,
By attaching this to a rotating shaft (hereinafter referred to as a shaft) of a roller, a roller for office equipment is generally manufactured.

The following methods have been known as methods for producing the office equipment roller using an elastic body. A method for producing an elastic body in which a molding die having a desired shape is filled with a liquid material such as polyurethane or a viscoelastic material such as rubber or thermoplastic elastomer, foamed, cooled, and taken out after cooling.
For this, for example, injection molding, transfer or press is used. In this case, the shaft is formed as a single piece, or is attached after molding by bonding or press fitting. By using the above method, a block-shaped (rectangular) elastic body is manufactured in advance, and a shaft is attached thereto by a method such as bonding or press fitting. Next, the roller body is manufactured by heating and fusing and polishing with, for example, a nichrome wire heater, or by peeling the outer skin by a peeling process disclosed in JP-A-10-104937. A method of manufacturing a roller main body by so-called extrusion foam molding in which an elastic material is extruded while being foamed. in this case,
The shaft is mounted after molding. As disclosed in JP-A-7-76049, an elastic material is supplied while moving an applicator disposed outside a rotating shaft in parallel with the shaft, and the material is foamed and hardened. To obtain the desired roller with

[0004] In recent years, the outer diameter of the roller has tended to decrease with the miniaturization of office equipment. Therefore, the elastic body forming the roller body around the shaft is required to satisfy necessary characteristics while being as thin as possible. However, in response to this demand, each of the above-mentioned methods has the following disadvantages. By manufacturing a mold that matches the required product dimensions, it is possible to support rollers having various thicknesses. However, as described above, since there are many types of the rollers, it is necessary to manufacture a dedicated molding die for each roller, which leads to an increase in the production cost, and also requires labor for managing the molding die.
Further, after the roller molding is completed, it is necessary to remove the mold from the mold and to clean the mold. Since a pre-molded block is shaved into a desired size and shape, for example, when manufacturing a roller having a small thickness of about 5 mm, the amount of wasteful elastic body increases, and the manufacturing cost increases. Increase. As described above, since a dedicated extrusion die is required for each roller, the production cost is increased and the management of the extrusion die is troublesome. Further, in manufacturing a roller of about 2 mm or less, it is very difficult to manufacture the roller,
The roundness accuracy of the outer diameter and inner diameter of the obtained roller is low,
Yield deteriorates. There is a fear that the foaming of the elastic material applied to the shaft becomes non-uniform due to the variation of the temperature of the elastic material at the time of foaming, resulting in a roller having different foam cell diameter, cell structure and elastic material density depending on the portion. Also, until the polymer reaction following the foaming reaction is promoted and the foamed structure does not easily lose its shape, this elastic raw material is merely a liquid having so-called slight bubbles, The viscosity is lower than the viscosity of the original liquid elastic raw material. For this reason, even if it is supplied to the shaft, the elastic raw material may hang down and flow. Also, in any of the above-mentioned methods, in order to set the hardness low, generally, AIBN
This is achieved by increasing the amount of foaming agent such as (azobiisobutyl lonitrile) to lower the density, but this also leads to worsening of permanent compression set, and therefore it is difficult to balance roll properties. Had become.

Therefore, as a roller for avoiding the above-mentioned disadvantages and a method of manufacturing the roller, Japanese Patent Laid-Open Publication No. Hei 8-6417 discloses a method of manufacturing an elastic body constituting a roller as a long strip, for example. A method of manufacturing a roller having a desired shape by spirally winding and fixing the outer periphery of a shaft and finally polishing the outermost peripheral portion of the roller is disclosed. Also, Japanese Patent Application Laid-Open No. 7-72754 discloses that after manufacturing a roller by a general manufacturing method described above,
There is disclosed a method of manufacturing a roller having a radial shape inclined at a required angle with respect to a radial line passing through the center in a cross section of the roller and providing a plurality of continuous slits in the longitudinal direction of the roller. In these manufacturing methods, since the roller is provided with a spiral or a continuous cut in the longitudinal direction, the cut lowers the apparent hardness of the elastic body constituting the roller, and therefore has low hardness and permanent compression distortion characteristics. It is to achieve both.

[0006]

However, in the roller and the method of manufacturing the roller disclosed in and above, the cuts formed in the roller manufactured by the roller are mechanically formed on the print medium such as paper when the roller is used. Further, a drawback is pointed out that a discontinuity is caused to appear electrically to leave traces such as wrinkles along the cuts and blurred prints on printed matter.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems inherent in prior art rollers for office equipment and a method of manufacturing the same.
The present invention has been proposed to solve this problem suitably, and it is an object of the present invention to provide a roller having both a low hardness and a high durability, a thin wall, and a method for easily manufacturing the roller.

[0008]

According to the present invention, there is provided a roller for office equipment, comprising: a roller body formed around a shaft; The roller body is constituted by a mixture obtained by mixing fine bubbles by a gas mixing method.

[0009]

According to another aspect of the present invention, there is provided a method of manufacturing a roller for office equipment, which comprises rotating a shaft serving as a core material of the roller for office equipment. While mixing, the mixture in which fine bubbles are mixed by the gas mixing method is continuously supplied to the outer peripheral surface of the shaft to form a roller body having a predetermined thickness, and then the mixture forming the roller body is cured. It is characterized by the following.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a roller for office equipment and a method for manufacturing the same according to the present invention will be described with reference to preferred embodiments. The present inventor blows a sufficient amount of gas into the liquid elastomer composition by a gas mixing method, and has many fine continuous pores obtained by bubbling,
It has been found that by using a foamed elastic body having a high apparent viscosity, a roller having low hardness, high mechanical durability, and a thin wall thickness can be easily obtained.

(Regarding Formulation Adjustment Step) The office equipment roller according to the present invention is manufactured through the respective steps shown in FIG. In the first formulation adjusting step, the liquid elastomer formulation is adjusted. The liquid elastomer composition preferably used here is composed of at least two components of a liquid elastomer raw material and a surfactant, and further includes a curing catalyst, carbon black or short carbon fiber imparting electric conductivity, if necessary. And an ion conductive agent, and / or a coloring pigment, an antioxidant, a filler represented by clay, calcium carbonate, or the like.

The liquid elastomer raw material is NR
(Natural rubber), SBR (styrene butadiene rubber), NBR
(Nitrile rubber), CR (chloroprene rubber), aqueous emulsion latex such as acrylic rubber or urethane rubber, organic solvent based plastisol such as soft vinyl chloride, so-called plastisol, or polyurethane, polyurea or liquid silicone rubber, etc. For example, a so-called liquid resin raw material not containing a dispersion medium such as water or an organic solvent is suitably used.

The surfactant is used to generate air bubbles by blowing gas into the liquid elastomer raw material and to stabilize the air bubbles. It also has the effect of adjusting and controlling the ventilation of the elastic body. The surfactant suitably used in the present invention is appropriately selected in accordance with the above-mentioned liquid elastomer raw material. Surfactants that can be suitably used in the aqueous emulsion latex include anionic, cationic, nonionic or amphoteric organic surfactants, and the desired generation can be achieved by using the organic surfactant. Adjust the cell diameter and air flow rate of the foamed elastic body after curing
You can control. In the case of a solvent-based blastisol or a liquid resin raw material, a silicone-based surfactant such as dimethylpolysiloxane-polyoxyalkylenequine copolymer alone or in combination with the organic surfactant is preferably used. You.

(Regarding the mixing / stirring step) After the above-mentioned raw materials are mixed to obtain a conditioned liquid elastomer composition, an inert gas such as dry air or dry nitrogen gas is added into the composition at a predetermined volume ratio. , And thoroughly mixed to obtain a gas-liquid mixture (a mixing / stirring step using a so-called gas mixing method). The foam manufactured by the gas mixing method adopted here has a feature that the bubbles are very fine and uniformly distributed, and is suitable for, for example, manufacturing of puffs for three-dimensional print printing in the field of clothing. Used in

In this step, a gas-liquid mixture containing the inert gas as fine bubbles is obtained from the mixture and the inert gas (that is, fine bubbles are generated in the mixture). Is also a step of stirring. For this stirring, for example, a dynamic mixer capable of mixing at a high shear rate, such as an oaks mixer, or a static mixer performing split dispersion mixing, such as a Rammond Spar mixer having a large total number of dispersions, are preferably used. You.

In the mixing of the liquid elastomer composition and the inert gas, the mixing ratio is a very important factor, and when the viscosity of the raw material of the elastomer in the liquid elastomer composition is usually about 1 to 5 poise. Liquid elastomer formulation: inert gas = 1: 1 to 10: 1. If the two are mixed within this range, the apparent viscosity of the mixture becomes extremely large, and it is possible to avoid a situation in which the mixture drips down during the production of the roller in a process described later.
By the way, if the mixing ratio of the gas-liquid mixture is 1: 1 or less, the apparent viscosity becomes small, and the mixture drips down without being able to generate sufficient air bubbles in a liquid state.
Conversely, if the ratio is 10: 1 or more, dripping can be avoided,
The size and number of bubbles in the foamed elastic body increase,
The strength as an elastic body cannot be maintained, and the permanent compression distortion characteristics are deteriorated, so that the durability that can be used as a roller cannot be achieved.

(Regarding the mixture applying step) When a gas-liquid mixture containing sufficiently fine bubbles is obtained by the above-described method, a mixture applying step of applying the gas-liquid mixture to the shaft by coating or the like is performed. Is done. Here, as a material of the shaft, a metal material obtained by subjecting nickel, electroless plating to aluminum, stainless steel, or steel, or a resin such as polypropylene is preferably used. Particularly, in the case of a pressure roller or the like heated to a predetermined temperature or higher, a metal having high heat resistance is suitably selected.

The mixture applying step is performed by, for example, an applying device 10 for applying a gas-liquid mixture M by extrusion coating shown in FIG. The applying device 10 rotatably supports the shaft 20 and fixes the shaft 20, and is fixed to a portion other than the fixing portion 22, which is movable in the lateral direction, and abuts on the top of the shaft 22. It is basically composed of an extruding part 24 which is movable vertically and has a die 24a at its tip, which serves as an extrusion port for the gas-liquid mixture M, and an air knife 26 which can inject high-pressure air toward the die 24a. Be composed. From the die 24a, the gas-liquid mixture M obtained through the above-described steps is extruded and applied at a time over the substantially entire length of the shaft 20 while controlling the amount of extrusion. Prior to the application of the gas-liquid mixture M, a process of applying various primers may be performed in a separate step for the purpose of increasing the adhesiveness to the surface of the shaft 20.

At this time, the shaft 22 is rotating in a predetermined direction at a predetermined speed by a driving unit (not shown), and the gas-liquid mixture M extruded from the extruding unit 24 is shown in FIG.
As shown in the figure, the mixture M is applied sequentially according to rotation. When this application step proceeds, the gas-liquid mixture M applied to the shaft 20 is directed downward. However, since the gas-liquid mixture M has a sufficient apparent viscosity, the gas-liquid mixture M hangs down from the shaft 22. It does not fall (see FIG. 3 (b)).
And, so as not to contact the gas-liquid mixture M that has been applied,
While sequentially moving the extruding section 24 upward, the mixture M is applied until it reaches a predetermined thickness (see FIG. 3C). When the application is completed until the roll body 12 has a predetermined thickness, the supply of the gas-liquid mixture M from the extrusion unit 24 is stopped, and
The mixture M already applied by the air knife 26 is separated from the die 24a (FIG. 3D). Here, the air knife 26 is used to separate them, but the invention is not particularly limited thereto.
May be used as disconnecting means. Then, the roller body 12 having a desired thickness is obtained by repeating the mixture applying step and the curing step described below. The coating method employed in this embodiment is a so-called extrusion coating method, and has a feature that a predetermined amount can be easily applied. In addition, a kiss (contact) coating including a bar coating, a roller coating represented by a gravure coating, a dip coating and a spray coating are appropriately and selectively adopted according to the characteristics.

When the above-described mixture applying step is completed, the shaft 20 is moved together with the fixing part 22 to dispose the fixing part 22 to which another shaft 20 is fixed at a predetermined position. Move on. The thickness of the gas-liquid mixture M applied at one time by this method, the predetermined thickness is 0.5.
About 15 mm is appropriate. If the thickness exceeds 15 mm, the gas-liquid mixture M cannot withstand its own weight, and a distorted roller with low roundness is produced. If the thickness is less than 0.5 mm, it is necessary to perform more main application steps and a curing step described below until a desired thickness is obtained, which increases the manufacturing cost and increases the outermost peripheral portion when applying the gas-liquid mixture M. The so-called skin layer to be formed becomes relatively large, so that the low hardness cannot be maintained, and there is a fear that the object of the present application may not be achieved.

(Curing Step) Next, a curing step is performed in order to cure the gas-liquid mixture M applied in the above-described mixture applying step. The curing method used in this curing step is
A commonly used curing method may be used, for example, a method of spontaneous chemical reaction, external heating or irradiation of radiation.

The curing method is also classified according to the type of the liquid elastomer raw material, and the curing method for each raw material will be described below. In the case where the liquid elastomer raw material is an aqueous emulsion latex, an insoluble substance is generated on the surface, the latex particles are made to adhere to each other to cause gelation, and a method of subsequently performing heating vulcanization, or causing a change in the molecular structure by heating. There is known a method in which the mixture M is gelled by the removal or removal of water as a trigger, and subsequently cured by causing a cross-linking reaction between molecules. For example, in the case of a solvent-based plastisol such as an organic solvent-based plastisol such as soft vinyl chloride, a method is known in which gelation is firstly triggered by a decrease in the amount of the solvent due to heating, and further heating is performed to completely remove the solvent and cure. I have. For example, in the case of a liquid resin raw material that does not contain a dispersion medium such as polyurethane, a method of spontaneous curing that occurs by mixing a curing agent in a main component, or a radiation or a radiation such as gamma ray as a trigger to cause a crosslinking reaction. Curing methods are known.

A roller layer having a predetermined thickness can be obtained by the above-described mixture applying step and the main curing step, but the thickness of the roller applied at one time is 0.5 to 15 m as described above.
m, the mixture applying step and the curing step may be repeated until the roller reaches a desired thickness. Finally, the roller having a desired thickness is subjected to washing or the like to remove unreacted substances remaining inside and is completed.

(Processing step) A roller having a desired thickness can be obtained through the above steps. However, in order to improve other useful functions and the yield, the following processing steps may be performed as necessary. May be implemented. In the case of a roller which is required to improve the product yield or to have a precise roller outer diameter accuracy, a processing step of polishing the obtained roller outer surface to precisely adjust to a desired outer diameter may be considered. In the present invention, the desired thickness of the roller can be determined in the unit of 0.5 to 15 mm, so that the amount of raw material and production time wasted by the polishing process can be extremely small as compared with the related art. This polishing is also suitably employed when stripping the skin layer formed on the outermost surface of the roller. When the skin layer on the outermost surface is removed in this way,
Since the cell skeleton is exposed and the surface becomes uneven, and the surface area is greatly increased, it is suitably used for a roller for use such as a toner transport roller.

In addition, a processing step of applying a coating film on the outermost surface may be performed. For example, in the case of a roller coated with fluorine, the releasability of the surface is greatly improved. If the roller is used as a pressure roller, the toner is easily peeled off from the roller, so that high image quality can be obtained. In addition, a processing step of giving electrical conductivity, for example, giving a conductive film containing carbon black is also conceivable. In this case, since the electric conductivity and the resistance value of the roller surface can be controlled to desired values, the method is suitably applied to, for example, a charging roller.

[0026]

[Experimental Examples] The following are some experimental examples, but the present invention is not limited to the contents disclosed in these experimental examples.
Regarding Experimental Example 2 and Experimental Example 3, the same parts as in Experimental Example 1 are described as “same as Experimental Example 1”.

(Experimental Example 1) Water-based emulsion latex-1 Shaft: A column-shaped free-cutting steel having a diameter of 6 mm and subjected to electroless plating was employed. Liquid latex compound: 100 parts by weight of polyurethane latex (trade name, Superflex E-2000, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., 50% solid content) as a raw material of liquid latex, and 2 parts by weight of poise 521, manufactured by Kao as a surfactant, It was blended to form a blend. Mixing / stirring step: Dry air is blown into the composition so that the density of the mixture finally becomes 0.3 g / cm ^3, and the mixture is sufficiently mixed and stirred with an Oaks mixer, and foamed to obtain a mixture. Was. Mixture application step: a delivery width of 22 to the shaft
The mixture obtained in the mixing and stirring step was extruded from a 5 mm die having a slit interval of 5 mm to give the mixture 5 mm. Curing step: Cured and dried in a hot air oven at 150 ° C. for 30 minutes. Processing step: Trimming both ends of the cured roller, polishing the outer periphery, 220 mm width, 3 mm wall thickness
Roller. (Results) The physical properties of the roller obtained from the above steps were as follows: density: 0.15 g / cm ³ , ASKER F hardness: 40, cell size of the polished surface: 50 μm, and a nip pressure of 1 kg was applied to this roller. The electrical resistance between the shaft and the outer peripheral surface of the roller at that time was 1 × 10 ⁸ Ω (at 1000 V), which was suitable for a transfer roller, for example.

(Experimental Example 2) Aqueous emulsion latex-2 shaft: same as in Experimental Example 1 Liquid latex compound: N as a liquid latex raw material
100 parts by weight of BR latex (trade name: LX531B, solid content: 65%, manufactured by Zeon Corporation) as a surfactant, manufactured by Kao
Product name 15 parts by weight of FR14, total of 6 with other additives
3.7 parts by weight were blended to give a blend. The content of the other additives is as follows: 50 parts by weight of an aqueous carbon black dispersion (manufactured by Lion, trade name: W310A, solid content: 17.5%), 2 parts by weight of powdered sulfur (manufactured by Hosoi Chemical), an antioxidant (Ouchi Shinko Co., Ltd.) 1 part by weight of chemical trade name NS-6 and NS-30 each 0.5 parts by weight), 1 part by weight of accelerator (trade name MZ manufactured by Ouchi Shinko Chemical), zinc oxide (manufactured by Shiraki Chemical) 3.2 parts by weight, 2.5 parts by weight of trimen base (Dow Chemical) and 4 parts by weight of sodium fluorosilicate. Mixing / stirring step: Dry air is blown into the composition so that the density of the mixture finally becomes 0.3 g / cm ^3, and the mixture is sufficiently mixed and stirred with an Oaks mixer, and foamed to obtain a mixture. Was. Mixture application step: Same as in Experimental Example 1. Curing step: Same as in Experimental Example 1. Processing step: Trimming both ends of the cured roller, polishing the outer periphery, 220 mm width, 3 mm wall thickness
NBR latex (trade name LX531 manufactured by Nippon Zeon Co., Ltd.)
B solid content 65%) and dried twice to obtain 40 μm
A solvent-soluble fluororesin (Sumitomo 3M) dissolved in methyl ethyl ketone
After applying THV-200P (trade name) under the condition of a dry thickness of 20 µm, it is cured in a hot air oven at 100 ° C for 1 hour.
Let dry. (Results) Each physical property of the roller obtained from the above-described process was AS
KERF hardness: 60, cell size on polished surface: 200μ
m, the electric resistance between the shaft and the outer peripheral surface of the roller when a nip pressure of 1 kg is applied to the roller is 1 × 10 ⁵ Ω (10
0 V), which was suitable for, for example, a charging roller.

(Experimental Example 3) Solvent-based shaft: Same as in Experimental Example 1 Liquid latex compound: Acrylic emulsion (trade name: F439A, manufactured by E-Tech) as a liquid latex raw material
100% by weight of solid content), 5 parts by weight of Emal AD25 and Kao as a surfactant as surfactant
Trade name: 7 parts by weight of Perex TA, and an aqueous dispersion of carbon black (Lion trade name: W
310A solid content of 17.5%) and 50 parts by weight of a melamine resin cross-linking agent (Sumitex M3 manufactured by Sumitomo Chemical Co., Ltd.) were mixed into 2 parts by weight to form a blend. Mixing / stirring step: Dry air is blown into the mixture so that the mixture has a final density of 0.2 g / cm ^3, and the mixture is sufficiently mixed and stirred with an Oaks mixer to form a mixture. Was. Mixture applying step: Same as in Experimental Example 1 Curing step: Cured and dried in a hot air oven at 160 ° C. for 30 minutes. Processing step: Trimming both ends of the cured roller, polishing the outer periphery, 220 mm width, 3 mm wall thickness
And a fluoro rubber latex (trade name: DAIEL LATEX GLS-21 manufactured by Daikin Industries, Ltd.)
3 solid content 50%) was adjusted at a ratio of main agent: hardener = 100: 5, applied at a coating thickness of 20 μm, and then cured and dried in a hot air oven at 160 ° C. for 1 hour. (Results) The physical properties of the roller obtained from the above-described process were as follows: density: 0.1 g / cm ³ , ASKERF hardness: 60, cell size on the polished surface: 30 μm, and a nip pressure of 1 kg applied to this roller. The electrical resistance between the shaft and the outer peripheral surface of the roller was 1 × 10 ⁴ Ω (at 100 V), which was particularly suitable for a charging roller.

[0030]

As described above, according to the roller for office equipment and the method of manufacturing the same according to the present invention, a liquid latex is used as a main raw material, which is previously foamed by a gas mixing method, and the apparent viscosity is increased. Since the roller is manufactured by applying the mixture to the shaft, a thin roller having both low hardness and high durability can be manufactured. Further, even if the desired thickness of the roller is small, there is a beneficial advantage that the material can be efficiently manufactured without wasting the raw material.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a method of manufacturing a roller according to a preferred embodiment of the present invention.

FIG. 2 is a schematic perspective view of a roller manufacturing apparatus according to a preferred embodiment of the present invention.

FIG. 3 is a process chart over time performed by the manufacturing apparatus shown in FIG. 2;

[Explanation of symbols]

 12 Roller body 20 Shaft M mixture

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masazumi Onishi 1-16-30, Chinen, Atsuta-ku, Nagoya-shi, Aichi Prefecture Inside INOAC Corporation Vessel Factory (72) Inventor Takayuki Nakamura 1st-year, Atsuta-ku, Nagoya-shi, Aichi Prefecture No. 16-30 Inoac Corporation Vessel F-Term (in reference) 2H003 CC05 3F049 CA11 LA02 LA05 LA07 LB03 3J103 AA02 AA41 EA03 EA20 FA12 FA15 GA02 GA52 HA03 HA41 4F213 AA31 AA42 AA45 AD03 WA18 WA53 WA53 WA53 WA87 WB01 WB18 WE03 WE16

Claims (8)

[Claims] A roller for office equipment comprising a roller body (12) formed around a shaft (20), wherein the roller body (12) is mixed with fine bubbles by a gas mixing method. M) A roller for office equipment characterized by comprising: 2. A shaft serving as a core material of a roller for office equipment.
While rotating (20), a mixture (M) containing fine bubbles mixed by a gas mixing method is continuously supplied to the outer peripheral surface of the shaft (20) to form a roller body (12) having a predetermined thickness, and then A method of manufacturing a roller for office equipment, wherein the mixture (M) constituting the roller body (12) is cured. 3. The method for manufacturing a roller for office equipment according to claim 2, wherein the step of supplying the mixture (M) and the step of curing the roller body (12) are repeated. 4. The production of a roller for office equipment according to claim 2, wherein after the roller body (12) having a predetermined thickness is formed, the outer surface of the roller body (12) is polished or coated. Method. 5. The method for producing a roller for office equipment according to claim 2, wherein the step of supplying the mixture (M) is performed by extrusion coating. 6. The method according to claim 2, wherein the raw material of the mixture (M) is obtained by mixing at least a liquid elastomer compound containing a liquid elastomer material and a surfactant with an inert gas. A method for manufacturing a roller for office equipment according to the above. 7. The method according to claim 6, wherein the liquid elastomer raw material is an aqueous emulsion latex. 8. The method according to claim 6, wherein the mixing ratio of the liquid elastomer compound and the inert gas is in the range of 1: 1 to 10: 1.